Apparatus for insecticide dusting rugs, upholstery, and clothing



NOV. 22, 1932. J R MAT-HES 7 1,888,732

APPARATUS FOR INSECTICIDE DUSTING RUGS, UPHOLSTERY, AND CLOTHING Filed Sept. 27 1930 2 Sheets-Sheet 2 Jabnf /fafbes Patented Nov. 22 .1932

JOHN B. alarm, DOVER, HEW HAIPS RAMON, OI DOVER, NEW HAMPSHIRE,

mm'rus ,roa-msnc'rrcma nus'rms noes, ornons'raa Ann'cmrnms Application filed September 27, mo. sefial in. 484,908. 7

The present invention relates to insecticide dusting attachments for domestic suction cleaners and the like and the method of using same, and aims generally to'provide a device which may be quickly and readily attached to the domestic suction cleaner so that a fine insecticide powder may be blown from the cleaner for treating fabrics, articles of furniture, clothing and. the like against moths, insects, vermin, etc.

One of the principal aims and objects of my invention is to provide an attachment or accessory adaptable to the domestic type of suction cleaner for supplying the insecticide or deodorizing powder to the suction inlet and fan chamber of the cleaner in a continuous stream from which it may be forcibly discharged in an air stream through a convenient nozzle-attached to the blower side of the cleaner.

As illustrative of one preferred embodiment of the invention reference may be had to the accompanying drawings wherein Fig. 1 is a side elevation of a suction cleaner with my attachment applied thereto- Fig. 2 is a vertical sectional view t en centrally through the attachment and a portion of the suction cleaner; 7

Fig. 3 is a transverse sectional view taken shown in position in dotted lines.

In the embodiment of the invention which has been selected for illustrative purposes the attachment preferably com rises a hollow shoe or casin 10 having suitable clamping means 11 for etachabl clamping the attachment to the nozzle 12 o a SllClZlOII cleaner hav ing a fan casing 13 housing a rotatable fan 14 suitably driven b an electric motor 15 as is usual in such evices. The outlet 16 of the fan chamber which usually discharges into the dust bag not shown) may be fitted with a blower no e 17 as is well understood.

The shoe or casing 10 is preferably T shaped having a nozzle sealing portion 18 .provided with a suitable gasket 19 of rubber HIRE, ASSIGNOB- TO THE EXPELLO GOIRIPO-- A CORPORATION OF NEW the attachment adapted to enter the ends of PATENT OFFICE;

or likematerial for efi'ectin an air tight seal against the bottom edge of t ,e suction cleaner nozzle 12 when the attachment is clamped thereto. Suitable ositioning lugs 20 are formed on'the nozzle sealing portion 18 of the suction o ening of the nozzle 12 to position the attac ment with reference thereto.

The forward part of the attachment is preferably pan shaped terminating in a slotted outlet 21 in thenozzle sealing portion of the attachment and adapted to re star with the openin in the nozzle 12 of t e suction cleaner. T e forward portion of the attachment is rovided with an upper closure mem-- ber 22 avin'g an upstanding receptacle. recelvmg mem e or screw threaded or otherwise suita shaped to form a cooperating air tight seal wit the open end of a powder containing can or rece tacle 24 which is referably supported on t e forward end 0? the attachment in inverted position. The receptacle 24 referabl .is the original container in whic the pow or is originally packed and may advantageously be in the form of the conventional metal can, glass container, or other ackage. The pan sha d end of the attac cut is preferably of lies width than the slot 21 communicating with the suction nozzle so as to provide within the attachment a forwardly converging suction chamber (see Fig. 4) having an area 25 of concentrated suction immediately adjacent the restricted air inlet 26 in the forward. end of the attachment. This area 25 of concentrated suction is axially located with reference to the powder containing receptacle 24. p

The receptacle receiving member 23 is provided with a central restricted insecticide supplyin orifice 27 through which the powder or 0t er insecticide contained in the receptacle 24 may be drawn into the pan shaped end of the base 10 by action of the centrally arranged area 25 of concentrated suction. 1

In order to preventcreation of a vacuum in the upper end of the rece acle 24 when powder is used as an insectici e as well as the arching of the powder immediately above the orifice 27, which results in interruption of 0 I r 23 which may be crimged portion of the casing theflow of insecticide into the suction chamber 26, I provide an airuinlet 28 which preferably takes the form of a goose neck vent 29 having one end secured in the pan shaped 10 and communicating with an opening outside thereof and the other end terminating slightly above the orifice 27 and positioned within the receptacle 24 when the receptacle is in place on the at- 10 tachment. ThlS vent pipe 29 provides a source of atmospheric air pressure within the receptacle to maintain apressure differentialbetween the interior of the receptacle and the suction chamber 25 so-that the suction within the'chamber is effective to create an air stream through the vent pipe 29 and through the orifice 27 .during the operation of the fan 14 and prevent congestion of the orifice 27 by the material and maintaining a continu- 20, ous uninterrupted flow ofmaterial'through tion chamber25 of the attachment is to conthe aperture.

In operation the attachment is readily applied to the suction nozzle 12 of a domestic suction cleaner and securely clamped thereon by clamping means 11, and a-can or other container of insecticide is securely attached to the receptacle receiving member 23 in inverted position so that the contents of the receptacle may feed down u on the top of the I recelving member 23. At t is time with the blower nozzle 17 in place in the outlet 16, the motor 15 and fan 14 may be started, creating a strong suction through the restricted air inlet 26 into the area 25 wherein the suction is most concentrated. As this area 25 is immediately below the orifice 27 in the receptacle receiving member, itsefi'ect is to draw the owdered insecticide into the suction cham r 25 where it is entrained in the air current produced by the rotating fan 14 and is drawn into the fan casing 13 and discharged out of the blower nozzle 17. Due to the high speed of rotation of modern domesticsuction cleaners the powder is discharged with such velocity that it has the ability to penetrate deeply into the n p of heavy pile fabrics so that moth worms find other insects may be effectively exterminated.

The effect of the suction within the suctinuously draw air from the receptacle 24 through the orifice 27 and thus create a continuous air current through the vent pipe 29 whose outlet is closely adjacent the orifice 27 preventing the formation of a vacuum within the receptacle 24 and ensuring a continuous flow of powder through the orifice 27.

Advantages of my invention reside in the simplicity of construction and ease with which it may be readily attached to and detached from domestic suction cleaners. The forwardly diverging suction chamber of the attachment which communicates with the slot 21 thereof and which has its area of concentrated suction immediately below the outlet from the n w PM... a...-

erous amount of powder into'the suction stream and into the fan casing 13from which itis discharged through the nozzle 17 By atmospheric air 'ressure within the receptacle immediately a ove maintaining a source 0 the discharge orifice 27 automatic means is provlded for maintalmn a continuous flow of powder through the orlfice without require 7 ing the manipulation of manual devices commonly employed for preventing choking: of the material at the dlscharge orifice.

An insecticide having a base of pa'radi- 7 cent, which have a tendency to stick and congeal in lumps within the receptacle. When the attachment is applied to a suction cleaner, the suction created through the neck 29 A is effective to maintain a continuous air 7 stream through the orifice 27, preventing the sticking together of the crystals and maintainin a continuous uninterrupted flow of crysta s through the orifice 27 into the casing 10. Obviously the larger lumps or crystals drawn intothe fan casing 13 are broken down v,

by the fan 14 into a finer powder, so that the insecticide may penetrate effectively into the na of a deep pile fabric.

lthough I have described my invention with reference to a preferred embodiment thereof it is apparent that other equivalent arrangements embodying the novel features are to be included as well.

I claim: y

1. In combination with a differential pressure device, a powder dusting attachment therefor comprising a hollow casing detachably connected with the intake of said device, said casing being of varying cross-sectional area to provide a region of concentrated suction, and means for supplying powder to said casing at the region of concentrated suction. Y

2. In combination with a difierential pressure device, a powder dusting attachment therefor whereby insecticide powder may be blown through said device, comprising a hol- Ill low casing removably connected at one'end with an intake passage of said device,'an air inlet at the remote end of said casing, a receptacle supporting member connected with said casing and having suction communication with said casing, and a powder receptacle detachably connected with the supportair inlet in said support for admitting air to said powder receptacle when the latter is in operative position on said support.

4. A powder dusting attachment for dlfierential pressure devices comprislng a hollow casing removably connected to an intake passage thereof, a support for a powder receptacle having a passage communicat ng with said casing, an air inlet to said casing, and an air inlet tube in said support for admitting air to said powder receptacle when the latter is in operative posltion on sa1dsupport, said air inlet tube terminating in proximity to said passage.

5. A powder dusting attachment for dlfferential pressure devices comprising a hol-. low casing removably connected to an intake passage thereof, a support for a powder receptacle having a passage communicating with said casing, an air inlet to said caslng, said air inlet having acontracted mouth, and an air inlet in said support for admitting 8.1 1 to said powder receptacle when the latter is in operative position on said support.

6. Apparatus for dusting or dr spraying insecticide powders comprising a ifierentlal pressure device, and means detachably con.- nected with said device providing a suction chamber, an orifice communicating therewith, and auxiliary air suction means for suplying insecticide powder through said onee in a continuous uninterru ted stream.

7. A powder diffusing attac cm for differential pressure devices comprising a casing having an air inlet and an outlet connected to the inlet passage of the device, a mixing passage in said casing between said air inlet andoutlet, a support for a powder receptacle, an orifice in said support discharging into said mixing passage, and an air supply extending through said support and discharging roximity to said orifice.

8. A pow er difiusing attachment for differential pressure devices comprisin a casing having an air inlet and an out et conn ected to the inlet passage of the device, a mixing passage in said casing between said air inlet and outlet, a supportfor a powder receptacle having an open top and means associated therewith for retaining the pow-' er receptacle on said support in inverted position to close its open topyan orifice in said support discharging into said mixing passage, and an air supply extending through said support and discharging iii-proximity to said orifice.

9. A powder diffusing attachment for differential pressure devices comprisin a casing having an air inlet and an out et connected to the inlet passage of the device, a

mixing passage in said casing between said.

air inlet and outlet, the top wall of said passage constitutin a support for a powder receptacle, an orifice'in said top wall, and an air supply extending through said sup rt and discharging in roximity to said ori fize.

10. A powder di using attachment for a difierential pressure device comprisin a casing having an air inlet and am out et connected to the inlet passage of the device, a

mixing passage in said casin between said air inlet and outlet, a support or a removable.

powder receptacle,;an orifice in said support discharging into said mixing passage, and means for retaining the powder receptacle on said support. 7

11. A powder difiusing attachment comprising'a casing having an air inlet and an outlet, a mixing passage in said casing between said air inlet and outlet, a support for a removable powder receptacle, an. rifice in said support discharging into sai mixing passage, and means for retaining the powder nozzle connected to the outlet from said evice, a mixin passage connected to the intake of said evice, an orifice in the top wall of said mixin passage, an air pipe discharging downwar immediately a ove said onfice, and-means for positionin a powder receptacle to maintain a supp y of powder around said ipipeand orifice, said positioning means inclu a closure for said receptacle havm tapered side walls wh1c mg a protuberance constituting slightl enter and rictiona ly engage in an opening in said receptacle.

14. In an insecticide duster in combination with an adapter for attachment to a suction intake opening in the housing of a differential pressure device, said adapter comprising a casing having an outlet leadin to said suction intake 0 ning, air inlet or admitting air to said casing, an orifice for admitting insecticide powder and the like to said casing, means surrounding said orifice constituting a support for a loose material supply and air suction means for maintaining a constant supply of material through said orifice.

In testimony whereof, I have signed my name to this specification. JOHN ,R. MATHES. 

